175/65R13 vs 195/55R13
Going from one to the other changes the overall height by -2.3 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 175/65R13 | 195/55R13 | Change |
|---|---|---|---|
| Overall height | 22.0" | 21.4" | -2.3 % |
| Sidewall | 4.48" | 4.22" | -5.7 % |
| Section width | 175 mm | 195 mm | +11.4 % |
| Circumference | 69.0" | 67.4" | -2.3 % |
| Revs per mile | 919 | 940 | +2.3 % |
| Axle height | 10.98" | 10.72" | -6.5 mm |
| Approved rim width | 5–6" | 5.5–7" | overlap 5.5–6" |
Both are approved on a rim 5.5" to 6" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 175/65R13. Fit 195/55R13 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.3 mph | -0.7 |
| 50 mph | 48.8 mph | -1.2 |
| 70 mph | 68.4 mph | -1.6 |
| 90 mph | 87.9 mph | -2.1 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,767 on the road, so it over-counts by 233. At a true 70 mph the first turns 1072 times a minute, the second 1097.